This example shows a single red circle moving erratically across an SVG canvas under the influence of a force simulation. The circle’s position updates on every tick of a d3.forceSimulation, with the code reassigning new random forceX and forceY forces relative to the node’s current location. After the first tick, the initial center force is removed, leaving only these randomized forces to drive the motion. The visualization uses d3.v4 and SVG circle elements, with the simulation’s tick handler directly setting the circle’s cx and cy attributes.